Self-threading shuttle



Jan. 25, 1927.. 1,615,314

A. SCHOTTLAND SELF THREADING SHUTTLE Filed Feb. 17 1926 I W1 I a ATTORNEY Patented Jan. 25, 1927.

ti NiiTiE D STATES SELF-THREADING SHUTTLE.

Application fi1ed February This invention relates to self-threading' shuttles for looms. Self-threading shuttles have not as yet been used to any considerable extent in silk looms principally because no tension means has yet been devised which will reliably receive the filling in the self-threading operation and thereupon retain the same in its control and which will also preserve the very nice tension which is always required in the weaving of silk. The object of this invention is therefore to pro- "vide a self-threading shuttle which may be successfully used in the weaving of silk and which to that end will maintain the proper tension on the filling.

In the drawing,

Fig. 1 is a top plan view of a fragment of a shuttle embodying the invention;

Egg. 2 is a right side elevation thereof;

Fig. 3 is a left side elevation;

Fig. l shows a certain fitting and associated parts removed and in left side elevation;

Fig.

parts by the screw 3 and affording the self-threading device of the shuttle, the shuttle body being also provided with a top groove t between this device and the adjoining end of the shuttle and a side notch 5 which tapers from the top of the shuttle downwardly and then is enlarged to form the opening 6. The fitting in general. follows a known construction, that is: It has an upwardly and also forwardly and rearwardly open cavity 7 in which is an overhanging threadguard 8, and it also has forwardly projecting tongues 9 and 10, the latter having its free end hook-shaped (Fig. 6) and deflected toward and extending under the other with a crevice 9 5) between so that when the filling A is drawn taut lengthwise of the shuttle, lying in the groove 4, it will pass the guard 8 and also through said crevice and be held against return by said guard and the tongue 10; and this tongue has a surface 10 deflected downwardly and terminating in a notch 10", the

'passage 9-12l1 whose inlet 5 a front elevation of said fitting and 17, .1926. Serial No. 88,735.

notch forn'iing with a forward side of the opening 6'the filling outlet 11 through which the filling is fed when the shuttle is weaving in the regular way and said surface forming with the forward side of the notch 5 the slot 12 'bywhich, in the replenishing of the shuttle, the filling is conducted to said outlet. (There may be guide pins 13 at the forward and rearward endsof outlet 11.) In short, the shuttle may be said to have a is at the top of the shuttle for the reception of the then lengthwise-extending filling but whose outlet, for delivery of the filling laterally in weaving, is at the side of the shuttle and hence lower than the inlet.

14 is a two-armed or bell-crank tension lever which is formed of wire. This lever has a pivoting eye 1 1 at the juncture of its twoarms,a thread-guiding eye 14:" at the end of its longer arm, and an eye i l at the end of its shorter arm. The bearing for the pivoting eye 14 of the lever is formed by an inclined slot 15 in the body of the fitting 3 which is traversed by a pin 16 arranged perpendicular to the plane penetrating eye 14: and forming the fulcrum of the lever. The eye 14 receives one end of an elastic band 17 which is attached to an adjusting screw 18 tapped into the shuttle, which has a slot 19 to admit the band to the screw (Fig. 3). This band tends to hold the lever in the full line position in Fig. 5. or in the position for receiving the filling in the act of threading the shuttle at which time it abuts tongue 9. The eyelet 14" is formed as a one-turn spiral, with the approach thereto opening upwardly; and

when the lever is in its said position said approach to its eyelet l i" is under and therefore in substantial registry with the crevice 9. Somewhat forward of the eye 14* in this position of the lever is a prong 20 depending from the tongue 10.

0peratz'0n.-It is of course understood that as a preliminary to replenishing the shuttle the end of the filling of the fresh package is attached to some part of the loom so 'that when the spent quill is ejected and the fresh package introduced into the shuttle the filling from the latter will rest in groove 4 and, being taut, will enter the passage formed by 9 12-11, catching under 8 and also under 10 as already described. On the next passage of the shuttle to the right through the shed a loop will be formed of the slot and in the filling the bight of which will at first be around the prong 20 (which is inclined rearward and toward the side of the shuttle having the outlet 12), and this bight will shift downwardly, due partly to passage 12 and partly to the incline of the prong, the part of the filling between the quill and the big-ht entering the eye lt" of the tension lever. The threading operation will now be completed. as soon as, in the further shifting of the filling downward along; passage 12 as the shuttle continues its mentioned movement, the filling occupies the filling outlet 11, in which it will now permanently remain because the approach to said outlet (passage 12) is restricted and also because the eye 14S has the spiral form mentioned. As soon as the filling is engaged with the tension lever it is oi course under spring tension. This tension obtains during the whole movement of the shuttle in each direction because not only when the shuttle moves to the right but also when it moves to the left the lever tends to maintain bend in the filling, in the latter case due to the torward end of outlet 11 being so located (Fig. 1) that the lever cannot retract without producing the bend.

It will be seen that, given a shuttle having a threading passage (912l1) which has its inlet at the top of the shuttle and terminating in a plane below this inlet in a filling outlet delivering at the side of the shuttle, I have provided a tension member which is normally spring-held in a position where its filling-eyelet-entrance (as 21, Fig. 5) registers with the inlet to the passage but is pivotally movable in an inclined plane and toward said outlet from a position where said eyelet-entrance so registers with said inlet.

Having thus fully described my invention what I claim and desire to secure by Letters Patent is:

1. A self-threading shuttle having a passage for the filling whose inlet is at the top of the shuttle and which terminates at the side of the shuttle in a plane below said inlet in a filling outlet, in combination with a spring-actuated tension device having a filling eyelet formed with an entrance to register with the passage-inlet and movable toward said outlet in an inclined plane from a position where said eyelet-entrance registers with said inlet, said device being normally spring-held with said eyelet-entrance registering with the inlet.

2. A self-threading shuttle having a passage for the filling whose inlet is at the top of the shuttle and which terminates at the side of the shuttle in a plane bel w said inlet in a filling outlet, in combination with a spring-actuated tension device having a filling eyelet formed with an entrance to register with the passagednlet and pivotally movable toward said outlet in an inclined plane from a position where said eyelet-- entrance registers with said inlet, said device being normally spring-held with said eyeletentrance registering with the inlet.

In testimony whereof I affix my signature. V

ABRAHAM SCHOTTLAND. 

